TCG Crossover GP II, LLC

13D and 13G Filings

13D/G filings: 13G on 25 securities
CIK: 0001969280
All SEC filings: View on sec.gov

Issuer	Symbol	CUSIP	% of Class	Shares	Form	Filed
ALX Oncology Holdings Inc. 13G/A Amendment 1 ALXO · 00166B105	ALXO	00166B105	4.2%	5,655,487	13G/A Amendment 1	8/14/2026 Event 6/30/2026
TCG Crossover GP II, LLC			2.1%	2,827,739
TCG Crossover Fund II, L.P.			2.1%	2,827,739
TCG Crossover GP III, LLC			2.1%	2,827,748
TCG Crossover Fund III, L.P.			2.1%	2,827,748
Chen Yu			4.2%	5,655,487
First Tracks Biotherapeutics, Inc. 13G TRAX · 337185102	TRAX	337185102	8.3%	2,895,304	13G	8/14/2026 Event 6/30/2026
TCG Crossover GP II, LLC			4.1%	1,447,652
TCG Crossover Fund II, L.P.			4.1%	1,447,652
TCG Crossover GP III, LLC			4.1%	1,447,652
TCG Crossover Fund III, L.P.			4.1%	1,447,652
Chen Yu			8.3%	2,895,304
Fulcrum Therapeutics, Inc. 13G/A Amendment 2 FULC · 359616109	FULC	359616109	0%	0	13G/A Amendment 2	8/14/2026 Event 6/30/2026
TCG Crossover GP II, LLC			0%	0
TCG Crossover Fund II, L.P.			0%	0
Chen Yu			0%	0
LB Pharmaceuticals Inc. 13G/A Amendment 2 LBRX · 50180M108	LBRX	50180M108	5.0%	1,447,310	13G/A Amendment 2	8/14/2026 Event 6/30/2026
TCG Crossover GP II, LLC			5.0%	1,447,310
TCG Crossover Fund II, L.P.			5.0%	1,447,310
Chen Yu			5.0%	1,447,310
Tango Therapeutics, Inc. 13G/A Amendment 4 TNGX · 87583X109	TNGX	87583X109	7.0%	10,147,867	13G/A Amendment 4	8/14/2026 Event 6/30/2026
TCG Crossover GP II, LLC			7.0%	10,147,867
TCG Crossover Fund II, L.P.			7.0%	10,147,867
Chen Yu			7.0%	10,147,867
Surrozen, Inc. 13G/A Amendment 2 SRZN · 86889P208	SRZN	86889P208	9.9%	1,148,101	13G/A Amendment 2	7/24/2026 Event 7/22/2026
TCG Crossover GP II, LLC			4.9%	574,054
TCG Crossover Fund II, L.P.			4.9%	574,054
TCG Crossover GP III, LLC			4.9%	574,047
TCG Crossover Fund III, L.P.			4.9%	574,047
Chen Yu			9.9%	1,148,101
Zai Lab Limited 13G ZLAB · 98887Q104	ZLAB	98887Q104	5.3%	59,130,750	13G	6/11/2026 Event 6/2/2026
TCG Crossover GP II, LLC			2.6%	29,565,330
TCG Crossover Fund II, L.P.			2.6%	29,565,330
TCG Crossover GP III, LLC			2.6%	29,565,420
TCG Crossover Fund III, L.P.			2.6%	29,565,420
Chen Yu			5.3%	59,130,750
LB Pharmaceuticals Inc. 13G/A Amendment 1 LBRX · 50180M108	LBRX	50180M108	6.4%	1,839,489	13G/A Amendment 1	5/15/2026 Event 3/31/2026
TCG Crossover GP II, LLC			6.4%	1,839,489
TCG Crossover Fund II, L.P.			6.4%	1,839,489
Chen Yu			6.4%	1,839,489
Fulcrum Therapeutics, Inc. 13G/A Amendment 1 FULC · 359616109	FULC	359616109	7.9%	5,250,000	13G/A Amendment 1	5/15/2026 Event 3/31/2026
TCG Crossover GP II, LLC			7.9%	5,250,000
TCG Crossover Fund II, L.P.			7.9%	5,250,000
Chen Yu			7.9%	5,250,000
Vistagen Therapeutics, Inc. 13G/A Amendment 1 VTGN · 92840H400	VTGN	92840H400	10.0%	4,100,029	13G/A Amendment 1	5/15/2026 Event 3/31/2026
TCG Crossover GP I, LLC			2.6%	1,025,007
TCG Crossover Fund I, L.P.			2.6%	1,025,007
TCG Crossover GP II, LLC			7.6%	3,075,022
TCG Crossover Fund II, L.P.			7.6%	3,075,022
Chen Yu			10.0%	4,100,029
Surrozen, Inc. 13G/A Amendment 1 SRZN · 86889P208	SRZN	86889P208	12.7%	1,473,101	13G/A Amendment 1	5/15/2026 Event 3/31/2026
TCG Crossover GP II, LLC			6.3%	736,554
TCG Crossover Fund II, L.P.			6.3%	736,554
TCG Crossover GP III, LLC			6.3%	736,554
TCG Crossover Fund III, L.P.			6.3%	736,554
Chen Yu			12.7%	1,473,101
Tango Therapeutics, Inc. 13G/A Amendment 3 TNGX · 87583X109	TNGX	87583X109	8.1%	11,597,737	13G/A Amendment 3	5/15/2026 Event 3/31/2026
TCG Crossover GP II, LLC			8.1%	11,597,737
TCG Crossover Fund II, L.P.			8.1%	11,597,737
Chen Yu			8.1%	11,597,737
Monte Rosa Therapeutics, Inc. 13G/A Amendment 1 GLUE · 61225M102	GLUE	61225M102	5.5%	4,622,151	13G/A Amendment 1	5/15/2026 Event 3/31/2026
TCG Crossover GP II, LLC			2.7%	2,311,076
TCG Crossover Fund II, L.P.			2.7%	2,311,076
TCG Crossover GP III, LLC			2.7%	2,311,075
TCG Crossover Fund III, L.P.			2.7%	2,311,075
Chen Yu			5.5%	4,622,151
Avalo Therapeutics, Inc. 13G AVTX · 05338F306	AVTX	05338F306	7.9%	3,017,120	13G	5/12/2026 Event 5/5/2026
TCG Crossover GP II, LLC			7.9%	3,017,120
TCG Crossover Fund II, L.P.			7.9%	3,017,120
Chen Yu			7.9%	3,017,120
Aura Biosciences, Inc. 13G AURA · 05153U107	AURA	05153U107	9.9%	9,533,333	13G	5/12/2026 Event 5/5/2026
TCG Crossover GP II, LLC			5.0%	4,766,667
TCG Crossover Fund II, L.P.			5.0%	4,766,667
TCG Crossover GP III, LLC			5.0%	4,766,666
TCG Crossover Fund III, L.P.			5.0%	4,766,666
Chen Yu			9.9%	9,533,333
Altimmune, Inc. 13G ALT · 02155H200	ALT	02155H200	9.8%	20,000,000	13G	5/1/2026 Event 4/24/2026
TCG Crossover GP II, LLC			5.0%	10,000,000
TCG Crossover Fund II, L.P.			5.0%	10,000,000
TCG Crossover GP III, LLC			5.0%	10,000,000
TCG Crossover Fund III, L.P.			5.0%	10,000,000
Chen Yu			9.8%	20,000,000
Vor Biopharma Inc. 13G VOR · 929033207	VOR	929033207	10.5%	5,673,078	13G	4/1/2026 Event 3/30/2026
TCG Crossover GP II, LLC			5.2%	2,836,539
TCG Crossover Fund II, L.P.			5.2%	2,836,539
TCG Crossover GP III, LLC			5.2%	2,836,539
TCG Crossover Fund III, L.P.			5.2%	2,836,539
Chen Yu			10.5%	5,673,078
Tectonic Therapeutic, Inc. 13G TECX · 878972108	TECX	878972108	6.2%	1,169,760	13G	2/27/2026 Event 2/12/2026
TCG Crossover GP II, LLC			3.1%	584,882
TCG Crossover Fund II, L.P.			3.1%	584,882
TCG Crossover GP III, LLC			3.1%	584,878
TCG Crossover Fund III, L.P.			3.1%	584,878
Chen Yu			6.2%	1,169,760
ADC Therapeutics SA 13G ADCT · H0036K147	ADCT	H0036K147	9.2%	11,390,175	13G	2/17/2026 Event 10/27/2025
TCG Crossover GP II, LLC			9.2%	11,390,175
TCG Crossover Fund II, L.P.			9.2%	11,390,175
Chen Yu			9.2%	11,390,175
Eyepoint, Inc. 13G/A Amendment 1 EYPT · 30233G209	EYPT	30233G209	4.3%	3,572,335	13G/A Amendment 1	2/17/2026 Event 12/31/2025
TCG Crossover GP II, LLC			4.3%	3,572,335
TCG Crossover Fund II, L.P.			4.3%	3,572,335
Chen Yu			4.3%	3,572,335
Tango Therapeutics, Inc. 13G/A Amendment 2 TNGX · 87583X109	TNGX	87583X109	10.0%	13,521,839	13G/A Amendment 2	2/17/2026 Event 12/31/2025
TCG Crossover GP II, L.P.			10.0%	13,521,839
TCG Crossover Fund II, L.P.			10.0%	13,521,839
Chen Yu			10.0%	13,521,839
Amylyx Pharmaceuticals Inc. 13G/A Amendment 1 AMLX · 03237H101	AMLX	03237H101	5.7%	6,243,812	13G/A Amendment 1	2/17/2026 Event 12/31/2025
TCG Crossover GP II, LLC			5.7%	6,243,812
TCG Crossover Fund II, L.P.			5.7%	6,243,812
Chen Yu			5.7%	6,243,812
Perspective Therapeutics, Inc. 13G CATX · 46489V302	CATX	46489V302	6.9%	7,915,567	13G	2/6/2026 Event 2/3/2026
TCG Crossover GP II, LLC			3.5%	3,957,784
TCG Crossover Fund II, L.P.			3.5%	3,957,784
TCG Crossover GP III, LLC			3.5%	3,957,783
TCG Crossover Fund III, L.P.			3.5%	3,957,783
Chen Yu			6.9%	7,915,567
ALX Oncology Holdings Inc. 13G ALXO · 00166B105	ALXO	00166B105	9.9%	13,011,849	13G	2/6/2026 Event 1/30/2026
TCG Crossover GP II, LLC			5.0%	6,505,925
TCG Crossover Fund II, L.P.			5.0%	6,505,925
TCG Crossover GP III, LLC			5.0%	6,505,924
TCG Crossover Fund III, L.P.			5.0%	6,505,924
Chen Yu			9.9%	13,011,849
Surrozen, Inc. 13G SRZN · 86889P208	SRZN	86889P208	11.4%	1,274,010	13G	2/2/2026 Event 1/26/2026
TCG Crossover GP II, LLC			5.7%	637,005
TCG Crossover Fund II, L.P.			5.7%	637,005
TCG Crossover GP III, LLC			5.7%	637,005
TCG Crossover Fund III, L.P.			5.7%	637,005
Chen Yu			11.4%	1,274,010
Century Therapeutics, Inc. 13G IPSC · 15673T100	IPSC	15673T100	9.9%	17,754,430	13G	1/15/2026 Event 1/9/2026
TCG Crossover GP II, LLC			4.9%	8,877,215
TCG Crossover Fund II, L.P.			4.9%	8,877,215
TCG Crossover GP III, LLC			4.9%	8,877,215
TCG Crossover Fund III, L.P.			4.9%	8,877,215
Chen Yu			9.9%	17,754,430
Tango Therapeutics, Inc. 13G/A Amendment 1 TNGX · 87583X109	TNGX	87583X109	6.3%	8,536,196	13G/A Amendment 1	11/14/2025 Event 9/30/2025
TCG Crossover GP II, LLC			6.3%	8,536,196
TCG Crossover Fund II, L.P.			6.3%	8,536,196
Chen Yu			6.3%	8,536,196
Nektar Therapeutics, Inc. 13G/A Amendment 2 NKTR · 640268108	NKTR	640268108	0%	0	13G/A Amendment 2	11/14/2025 Event 9/30/2025
TCG Crossover GP II, LLC			0%	0
TCG Crossover Fund II, L.P.			0%	0
Chen Yu			0%	0
Cidara Therapeutics, Inc. 13G/A Amendment 1 CDTX · 171757206	CDTX	171757206	0%	0	13G/A Amendment 1	11/14/2025 Event 9/30/2025
TCG Crossover GP II, LLC			0%	0
TCG Crossover Fund II, L.P.			0%	0
Chen Yu			0%	0
Alector, Inc. 13G ALEC · 014442107	ALEC	014442107	9.2%	10,000,000	13G	11/14/2025 Event 10/22/2025
TCG Crossover GP II, LLC			4.6%	5,000,000
TCG Crossover Fund II, L.P.			4.6%	5,000,000
TCG Crossover GP III, LLC			4.6%	5,000,000
TCG Crossover Fund III, L.P.			4.6%	5,000,000
Chen Yu			9.2%	10,000,000
Monte Rosa Therapeutics, Inc. 13G GLUE · 61225M102	GLUE	61225M102	7.2%	4,427,705	13G	10/17/2025 Event 10/10/2025
TCG Crossover GP II, LLC			3.6%	2,213,853
TCG Crossover Fund II, L.P.			3.6%	2,213,853
TCG Crossover GP III, LLC			3.6%	2,213,852
TCG Crossover Fund III, L.P.			3.6%	2,213,852
Chen Yu			7.2%	4,427,705
LB Pharmaceuticals Inc. 13G LBRX · 50180M108	LBRX	50180M108	7.8%	1,745,015	13G	9/18/2025 Event 9/12/2025
TCG Crossover GP II, LLC			7.8%	1,745,015
TCG Crossover Fund II, L.P.			7.8%	1,745,015
Chen Yu			7.8%	1,745,015
Nektar Therapeutics 13G/A Amendment 1 NKTR · 640268108	NKTR	640268108	9.3%	1,933,333	13G/A Amendment 1	8/14/2025 Event 6/30/2025
TCG Crossover GP II, LLC			9.3%	1,933,333
TCG Crossover Fund II, L.P.			9.3%	1,933,333
Chen Yu			9.3%	1,933,333
Adverum Biotechnologies, Inc. 13G/A Amendment 1 ADVM · 00773U108	ADVM	00773U108	8.9%	1,871,482	13G/A Amendment 1	5/15/2025 Event 3/31/2025
TCG Crossover GP II, LLC			8.9%	1,871,482
TCG Crossover Fund II, L.P.			8.9%	1,871,482
Chen Yu			8.9%	1,871,482
Dianthus Therapeutics, Inc. 13G/A Amendment 1 DNTH · 252828108	DNTH	252828108	4.7%	1,501,624	13G/A Amendment 1	5/15/2025 Event 3/31/2025
TCG Crossover GP II, LLC			4.7%	1,501,624
TCG Crossover Fund II, L.P.			4.7%	1,501,624
Chen Yu			4.7%	1,501,624
RAPT Therapeutics, Inc. 13G RAPT · 75382E109	RAPT	75382E109	10.0%	13,193,110	13G	1/3/2025 Event 12/27/2024
TCG Crossover GP II, LLC			10.0%	13,193,110
TCG Crossover Fund II, L.P.			10.0%	13,193,110
Chen Yu			10.0%	13,193,110

Includes filings since 12/18/2024, when the SEC began requiring structured 13D and 13G data.